DescriptionHeliocentric vs Geocentric views a history of Astronomy TPT.webm

English: Modelling the sky above us we need to be able to talk to others about what we have seen. We need to be able to describe the object, what time we observed it, and be able to tell where in the sky the object is. Vocabulary Focus; Celestial Sphere, Horizon, Zenith, Azimuth, Altitude